搜尋結果
2021年11月12日 · If your calcium levels are too high or too low, you may need a parathyroid hormone blood test to learn why. Tiny parathyroid glands in your neck may be making too much or too little hormone to ...
2023年7月12日 · Secondary hypertension is high blood pressure from an illness such as kidney failure, sleep apnea, preeclampsia, or thyroid disease. Nearly 50% of U.S. adults, or around 119 million people, have ...
2023年4月7日 · Taking medicine at the wrong doses or times or stopping high blood pressure medicine suddenly can be downright dangerous to your health. If your blood pressure remains too high, you're more likely ...
- Pathophysiology
- Significance
- Signs and symptoms
- Overview
- Prognosis
A blood pressure reading appears as two numbers. The first and higher of the two is a measure of systolic pressure, or the pressure in the arteries when the heart beats and fills them with blood. The second number measures diastolic pressure, or the pressure in the arteries when the heart rests between beats.
Optimal blood pressure is less than 120/80 (systolic/diastolic). In healthy people, low blood pressure without any symptoms is not usually a concern and does not need to be treated. But low blood pressure can be a sign of an underlying problem -- especially in the elderly -- where it may cause inadequate blood flow to the heart, brain, and other vi...
Chronic low blood pressure with no symptoms is almost never serious. But health problems can occur when blood pressure drops suddenly and the brain is deprived of an adequate blood supply. This can lead to dizziness or lightheadedness. Sudden drops in blood pressure most commonly occur in someone who's rising from a lying down or sitting position t...
Postural hypotension is considered a failure of the cardiovascular system or nervous system to react appropriately to sudden changes. Normally, when you stand up, some blood pools in your lower extremities. Uncorrected, this would cause your blood pressure to fall. But your body normally compensates by sending messages to your heart to beat faster ...
The risk of both low and high blood pressure normally increases with age due in part to normal changes during aging. In addition, blood flow to the heart muscle and the brain declines with age, often as a result of plaque buildup in blood vessels. An estimated 10% to 20% of people over age 65 have postural hypotension.
2023年11月14日 · But the normal ferritin levels, by age, are about: 24-336 nanograms per milliliter for adults assigned male at birth. 24-307 nanograms per milliliter for adults assigned female at birth. 25-200 ...
2023年12月25日 · If your heart feels out of rhythm or “flutters,” especially when you're anxious or stressed, it could be caused by premature ventricular contractions (PVCs). They're a common reason for ...
2023年8月18日 · Dysphagia Causes. A wide range of issues can cause dysphagia. These include: Disturbances of the brain such as those caused by Parkinson's disease, multiple sclerosis, or ALS ( amyotrophic lateral ...
